removed pointless warning (cf. http://stackoverflow.com/questions/20233463/isabelle-metis-proof-state-contains-the-universal-sort/20785045#20785045)
syntax: glob
*~
*.class
*.jar
*.orig
*.rej
*.pyc
.DS_Store
.swp
syntax: regexp
^contrib
^heaps/
^browser_info/
^doc/.*\.dvi
^doc/.*\.eps
^doc/.*\.pdf
^doc/.*\.ps
^src/Tools/jEdit/dist/